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Missing data points when plotting with Qt

From: oss
Subject: Missing data points when plotting with Qt
Date: Tue, 15 Aug 2017 16:31:02 +0200 (CEST)
User-agent: ALL-INKL Webmail 2.11

Hi everyone,

I just plotted about 50'000 data points using the Qt graphics toolkit and recognised that many data points are left out. I think the plot backend reduces the number of points due to performance reasons. However, if I change the graphics toolkit to gnuplot the result looks more like what I expect, i.e. much more points are plotted. On the other hand, if I do plot(x, y, '.') the result generated by Qt also looks fine. Is there a way to adjust the number of plotted points for the Qt toolkit when I do plot(x,y)?

Octave version is 4.2.1.

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